Answer :
if you want to determine the perimeter / length, use a normal measure - ft.
The area is [tex] ft^{2} [/tex]
and the volume [tex] ft^{3}[/tex]
The area is [tex] ft^{2} [/tex]
and the volume [tex] ft^{3}[/tex]
Feet cubed is used when finding volume, feet squared is used when finding area, and feet is used when finding length, so in this case you would use feet